At best, you're going to get Pseudonymity doing things that way. A determined adversary will know that your friend got the bitcoins and transferred them to someone. It wouldn't take that much digging to find out who your friend transferred those bitcoins to.

For example, if you were to purchase something illegal with those bitcoins and law enforcement cared about it, they would find out that these bitcoins at one point were with your friend. At that point, they'd go and find out from him who he sold the bitcoins to. You would be found out very quickly if they can locate your friend. This is, in fact, the sort of thing detectives do all the time.

You'd have much better luck tumbling your bitcoins.

You can also simply use a VPN like IPvanish to purchase the BTC yourself with giftcards bought with cash on Localbitcoins.com from an anonymus user account which is quite easy & then send coin to an offline wallet app. Now, As this could technically be traced the effort, time, and resources, required to trace this transaction back to you would only be the sort that the NSA might use to track a high level terrorist, and eyes would already have to have been in place from the 1st action in this chain of transactions as well, so by no means will any State or lower level law enforcement have the capability let alone the need, unless like I said before it were a sought after terrorist.